Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab703f694be29d8a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 14:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72d6e3fcbd468da18ec9d77554a698d SHA-1: 862ee1fd5e009bbe41f6c056422ac2d0ba168a64 SHA-256: ab703f694be29d8a25bb73569df353161c90cde6486c6e3ab172f6bf2350fe80
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link identified is https://ttraff.cc/pify?keyword=circular+motion+problems+pdf, which is a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to redirect users to malicious content under the guise of providing PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=circular+motion+problems+pdf
    • http://files.greenhopefinearts.org/uploads/1/3/0/7/130775647/rutogafilekujar_gagogigopoda_kaxipo_welinozeme.pdf
    • http://files.lutheranlatinoministries.org/uploads/1/3/2/6/132682585/batov.pdf
    • http://zozutenez.aalumber.com/uploads/1/3/0/8/130874038/dojulil_mikogoxu_rabakakuzupib.pdf
    • http://files.aldreaalien.com/uploads/1/3/0/8/130814205/7142722.pdf
    • http://dovodulu.amfilms.com/uploads/1/3/1/4/131438641/19c637750.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/monazata.pdf
    • https://cdn.shopify.com/s/files/1/0435/2815/9381/files/begimumabineburag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/eq_paladin_spells.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/b_flat_fake_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/26798459258.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/45906909729.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/fevawutubazizufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/46023313368.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/tozosefanatakutifozipu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/sadege.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/dinerigojivisetijib.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/94042181710.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006613.bin
d6a3b8c47459fee70acf7c85f9f9094da5319cde5df3f0e4a2c68135a47cb027
pdf-font-stream PDF embedded font (sfnt) at offset 0x6613 5344 bytes
font_01_sfnt_off0000781b.bin
a5b641f9f63fe17378c0775a43e10b132f3c444a4de781f396efca1a9bd691f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x781B 10264 bytes